Battery pack frame and electric tractor

Abstract

The utility model relates to electric tractor technical field discloses battery package frame and electric tractor, and battery package frame includes: main frame, inside has installation space, and main frame includes main frame body and a plurality of mounting beams, and main frame body is connected with the one side of frame width direction through mounting beam, middle frame is located above the first battery installation position in installation space, and middle frame is detachably connected with main frame, top frame is located at the top of installation space, and top frame is detachably connected with main frame and middle frame respectively, and the utility model discloses the form of setting mounting beam, and the back type battery frame can be shifted to the both sides of frame, reduces the whole vehicle gravity center, makes the cab rear portion of vehicle can carry out more function and arrangement extension, in addition, the detachable connection mode is used between main frame, middle frame and top frame, and each layer structure is independent, guarantees that processing tolerance will not be accumulated too big, can optimize the installation process of battery package.

Description

Technical Field

[0001] This utility model relates to the field of electric tractor technology, specifically to a battery pack frame and an electric tractor. Background Technology

[0002] In recent years, with the continuous development of new energy technologies, rear-mounted battery swapping heavy-duty trucks have gained widespread market favor in the heavy-duty truck sector due to their advantages such as speed, convenience, and high energy utilization. The battery packs of rear-mounted battery swapping heavy-duty trucks are typically installed on the chassis behind the cab. Through specific design, the battery packs can be quickly removed and installed, thereby significantly reducing the time required for charging and improving vehicle operating efficiency.

[0003] Currently, the battery pack frame of rear-mounted battery swapping heavy trucks is usually located at the rear of the cab and is welded together from multiple horizontal and vertical beams connected end to end. Due to the heavy weight and high position of the frame, this structural arrangement will change the center of gravity of the entire vehicle, making the center of gravity of the vehicle too high, which will affect the driving performance of the vehicle. Utility Model Content

[0004] In view of this, the present invention provides a battery pack frame and an electric tractor to solve the problem that the battery arrangement of existing battery-swapping heavy trucks affects the vehicle's driving performance.

[0005] In a first aspect, this utility model provides a battery pack frame, comprising: a main frame having an internal installation space, the main frame including a main body and multiple mounting beams, the mounting beams extending vertically, the main body being connected to one side of the vehicle frame in the width direction via the mounting beams, and the main body having a first battery mounting position; a middle frame disposed in the installation space and located above the first battery mounting position, the middle frame being detachably connected to the main frame, and the top of the middle frame having a second battery mounting position; and a top frame disposed at the top of the installation space and located above the second battery mounting position, the top frame being detachably connected to both the main frame and the middle frame.

[0006] Beneficial effects: By setting up mounting beams, the rear-mounted battery frame can be moved to both sides of the vehicle frame, lowering the overall center of gravity and allowing for more functional and layout expansion in the rear of the vehicle's cab. In addition, the main frame, middle frame, and top frame are connected by a detachable method, and each layer of the structure is independent. This ensures that the processing tolerances do not accumulate too much and optimizes the battery pack installation process. The battery pack can no longer be installed on the frame using the traditional push-pull method, but can be installed using a more convenient hoisting method, saving manpower and effectively solving the problem that the battery layout of existing battery-swapping heavy trucks affects the vehicle's driving performance.

[0007] In one optional embodiment, the main frame includes a first main frame extending longitudinally and a second main frame extending vertically. The first main frame has a second main frame at each end along the longitudinal direction, and the bottom of the first main frame is connected to the second main frame. The middle frame includes a middle frame body and a plurality of connecting components. The two ends of the middle frame body along the longitudinal direction are detachably connected to the corresponding second main frame through fastening components. The middle frame body is detachably connected to the corresponding mounting beam through connecting components.

[0008] Beneficial effects: The main frame has a simple and reliable structure. The first main frame can reliably support the battery. The second main frame can restrict the battery from moving freely along the longitudinal Y direction, and at the same time, it can form a support point for the installation of the middle frame. The middle frame is connected to the second main frame and the mounting beam. The multiple connection points make the middle frame more stable after installation, thus better supporting the battery.

[0009] In one optional embodiment, the central frame includes multiple longitudinal beams and multiple transverse beams, with the longitudinal beams spaced laterally and adjacent longitudinal beams connected by multiple spaced transverse beams; the connecting assembly includes diagonal braces and connecting plates, with one end of the diagonal brace connected to the bottom of the longitudinal beam near the mounting beam and the other end connected to the wall of the mounting beam via the connecting plate; and / or, at least one side wall of the mounting beam is provided with a support seat, the top of the support seat is provided with a support position, and the longitudinal beam near the mounting beam is provided with a mating seat, with the central frame overlapping and mating with the support position via the mating seat.

[0010] Beneficial effects: The central frame structure is simple and reliable. Using this type of connecting component, it occupies little space while the connection area between the connecting plate and the mounting beam is also large. This not only makes the connection more stable and reliable, but also avoids occupying the space for the battery in the first battery mounting position. In addition, the cooperation between the mating seat and the support seat can effectively increase the number of support points of the central frame. The support seat can distribute the stress of the connecting components and improve the reliability of the mounting beam in supporting the central frame.

[0011] In one alternative embodiment, the top frame includes a top frame body and a first top vertical beam. The two ends of the top frame body are connected to a second main frame, and one end of the top frame body is connected to an installation beam. The top of the first top vertical beam is connected to the end of the top frame body away from the installation beam, and the bottom is connected to the end of the first main frame away from the installation beam.

[0012] Beneficial effects: The top frame is simple and reliable. It not only provides protection and restraint above the first battery mounting position, but also provides protection and restraint on the side of the first and second battery mounting positions away from the mounting beam in the lateral direction X.

[0013] In one alternative implementation, the end of the middle frame away from the mounting beam is detachably connected to the first top vertical beam.

[0014] Beneficial effects: The first vertical beam can provide more support for the central frame, which can effectively improve the stability of the central frame and also improve the integrity of the battery pack frame.

[0015] In one alternative embodiment, the top frame further includes a second top vertical beam, the top of which is connected to the end of the top frame away from the mounting beam. The main frame also includes a support beam, the bottom of which is connected to the end of the first main frame away from the mounting beam. A connecting seat is provided at the end of the middle frame away from the mounting beam. The bottom of the second top vertical beam is detachably connected to the top of the support beam through the connecting seat.

[0016] Beneficial effects: With this connection method, the support beam can support the end of the central frame away from the installation beam when the top frame is not assembled. The structure is simple and reliable, and it also improves the overall strength of the frame.

[0017] In one alternative embodiment, the battery pack frame further includes support members that are connected to the main frame, mounting beam, and top frame, respectively.

[0018] Beneficial effects: The support components can further improve the reliability and integrity of the internal support of the battery pack frame.

[0019] In one optional embodiment, the main frame also includes protective plates, with protective plates provided at both ends of the first main frame in the longitudinal direction, and the protective plates are respectively connected to the first main frame and the second main frame.

[0020] Beneficial effects: The protective plate can strengthen the structure and further improve the structural reliability of the battery pack frame at both ends in the longitudinal Y direction.

[0021] Secondly, the present invention also provides an electric tractor vehicle, comprising: a vehicle body having a frame extending longitudinally; at least two of the aforementioned battery pack frames symmetrically arranged on both sides of the frame laterally; and a battery disposed in a first battery mounting position and a second battery mounting position of the battery pack frames.

[0022] In one alternative implementation, the top of the battery pack frame is on the same plane as the top of the vehicle frame, and / or, the battery pack frames disposed opposite each other are connected by a number of crossbars located at the bottom of the vehicle frame.

[0023] Beneficial effects: This arrangement of the battery pack frame lowers the center of gravity of the vehicle while maintaining a uniform height of the upper surface of the entire frame at the rear of the cab. This allows for more functional and layout expansions, avoids interference between the battery pack frame and other components, and the crossbars effectively improve the stability of the battery pack frame after installation, preventing it from swaying. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional schematic diagram of a battery pack frame according to an embodiment of the present utility model; Figure 2 for Figure 1 A three-dimensional schematic diagram of the main frame of the battery pack frame shown; Figure 3 for Figure 1 A three-dimensional schematic diagram of the middle frame of the battery pack frame shown; Figure 4 for Figure 1 A three-dimensional schematic diagram of the top frame of the battery pack frame shown; Figure 5 for Figure 1 A three-dimensional schematic diagram of the support components of the battery pack frame shown; Figure 6 for Figure 1 The diagram shown is a 3D representation of the battery pack frame when the battery is first installed. Figure 7 for Figure 6 The diagram shown is a 3D representation of the battery pack frame after installation. Figure 8 for Figure 7 The diagram shown is a 3D representation of the battery pack frame after the battery is first installed and the top frame is installed. Figure 9 This is a schematic diagram of the assembly of a portion of an electric tractor according to an embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached figures: 1. Main framework; 101. Main frame; 1011. First main frame; 1012. Second main frame; 1013. Support beam; 1014. Guard plate; 102. Mounting beam; 1021. Support base; 2. Medium framework; 201. Middle frame; 2011. Middle longitudinal beam; 2012. Middle transverse beam; 2013. Fitting seat; 2014. Connecting seat; 202. Connecting component; 2021. Diagonal brace; 2022. Connecting plate; 3. Top frame; 301. Top frame body; 302. First top vertical beam; 303. Second top vertical beam; 304. First support; 305. Second support; 4. Support components; 5. Frame; 6. Battery; 7. Crossbars; X, horizontal; Y, vertical; Z, vertical. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] The following is combined Figures 1 to 9 The following describes embodiments of the present invention.

[0029] According to an embodiment of the present invention, in one aspect, a battery pack frame is provided, comprising: The main frame 1 has an internal installation space. The main frame 1 includes a main frame body 101 and multiple mounting beams 102. The mounting beams 102 extend vertically along Z. The main frame body 101 is connected to one side of the vehicle frame 5 in the width direction through the mounting beams 102. The main frame body 101 has a first battery mounting position. The middle frame 2 is set in the installation space and located above the first battery mounting position. The middle frame 2 is detachably connected to the main frame 1, and the top of the middle frame 2 has a second battery mounting position. The top frame 3 is located at the top of the installation space and above the second battery mounting position. The top frame 3 is detachably connected to the main frame 1 and the middle frame 2.

[0030] By using the battery pack frame of this embodiment and setting the mounting beam 102, the rear battery frame can be transferred to both sides of the frame 5, lowering the center of gravity of the vehicle. This allows for more functional and layout expansion in the rear of the vehicle's cab. In addition, the main frame 1, middle frame 2, and top frame 3 are connected in a detachable manner, and each layer of the structure is independent. This ensures that the processing tolerances do not accumulate too much and also optimizes the battery pack installation process. The battery pack can no longer be installed on the frame using the traditional pushing and pulling method, but can be installed using a more convenient hoisting method, saving manpower and effectively solving the problem that the battery layout of existing battery-swapping heavy trucks affects the vehicle's driving performance.

[0031] It should be noted that in this embodiment, the battery pack is battery 6, and the horizontal X refers to... Figure 1 The direction of the "X" indicated by the middle arrow is also the width direction of the vehicle; the longitudinal direction Y refers to... Figure 1 The direction indicated by the middle arrow "Y" is also the length direction of the vehicle; the vertical Z refers to... Figure 1 The direction of "Z" indicated by the middle arrow is also the height direction of the vehicle; the descriptions of top and bottom, as well as up and down, refer to their relative positions in the vertical Z direction.

[0032] Specifically, such as Figures 6 to 8 As shown, since the main frame 1, the middle frame 2 and the top frame 3 can be installed layer by layer from bottom to top along the vertical Z direction, the first layer of battery 6 can be installed into the corresponding first battery mounting position after the main frame 1 is installed. After the middle frame 2 is installed, the second layer of battery 6 can be installed into the corresponding second battery mounting position. Finally, the top frame 3 is installed, which greatly facilitates the battery pack installation process and reduces manpower and time.

[0033] Furthermore, there are no limitations on the detachable connection method between structures; it can be a snap-fit ​​connection, the use of fasteners, etc. Preferably, the detachable connection method between structures is to use fasteners such as bolts, nuts, and screws, which facilitates disassembly and makes the connection more stable and reliable.

[0034] Furthermore, there is no limitation on the number of batteries 6 that can be installed in the first battery mounting position and the second battery mounting position. One battery can be installed in each position, or multiple batteries 6 can be arranged in one mounting position. The choice can be made flexibly according to the application requirements.

[0035] In one possible implementation, the main frame 101 includes a first main frame 1011 extending along the longitudinal direction Y and a second main frame 1012 extending along the vertical direction Z. The first main frame 1011 has a second main frame 1012 at each end along the longitudinal direction Y, and the bottom of the first main frame 1011 and the second main frame 1012 are connected. The middle frame 2 includes a middle frame body 201 and a plurality of connecting components 202. The two ends of the middle frame body 201 along the longitudinal direction Y are detachably connected to the corresponding second main frame 1012 through fastening components. The middle frame body 201 is detachably connected to the corresponding mounting beam 102 through the connecting components 202. The main frame body 101 has a simple and reliable structure. The first main frame 1011 can reliably support the battery 6. The second main frame 1012 can restrict the battery 6 from moving freely along the longitudinal direction Y, and can also form a fulcrum for supporting the installation of the middle frame 2. The middle frame 2 is connected to both the second main frame 1012 and the mounting beam 102. The multiple connection points make the middle frame 2 more stable after installation, thus better supporting the battery 6.

[0036] In one possible implementation, the central frame 201 includes a plurality of central longitudinal beams 2011 and a plurality of central transverse beams 2012. The plurality of central longitudinal beams 2011 are spaced apart along the transverse direction X, and adjacent central longitudinal beams 2011 are connected by a plurality of spaced central transverse beams 2012. The connecting component 202 includes a diagonal brace 2021 and a connecting plate 2022. One end of the diagonal brace 2021 is connected to the bottom of the middle longitudinal beam 2011 near the mounting beam 102, and the other end is connected to the wall of the mounting beam 102 through the connecting plate 2022. The middle frame 201 has a simple and reliable structure. Using this type of connecting component 202, the space occupied is small, and the connection area between the connecting plate 2022 and the mounting beam 102 is also large. This not only makes the connection more stable and reliable, but also avoids occupying the arrangement space of the battery 6 in the first battery mounting position.

[0037] It is understood that, as an alternative implementation, the connecting component 202 can also be a separate connecting plate or connecting column, and its installation position can also be the top of the longitudinal beam 2011 or the side along the transverse X, as long as the longitudinal beam 2011 and the mounting beam 102 can be stably connected.

[0038] Among them, such as Figures 1 to 3 As shown, a groove is formed on the side of the mounting beam 102 facing the central frame 201. The connecting plate 2022 is located in the groove and fits against the inner wall of the groove, and is connected by fastening components such as bolts.

[0039] In addition, there is no limit to the number of longitudinal beams 2011 and transverse beams 2012; they can be selected flexibly according to requirements.

[0040] Preferably, such as Figure 2 and Figure 3 As shown, three intermediate crossbeams 2012 are spaced between the two intermediate longitudinal beams 2011. The two ends of the two intermediate longitudinal beams 2011 are respectively provided with first mounting seats, and the corresponding positions of the second main frame 1012 are provided with second mounting seats. The intermediate longitudinal beams 2011 are connected to the second mounting seats along the vertical Z direction through the first mounting seats and then connected and fixed by fastening components such as bolts.

[0041] In one possible implementation, at least one side wall of the longitudinal Y direction of the mounting beam 102 is provided with a support seat 1021, and a support position is provided on the top of the support seat 1021. A mating seat 2013 is provided on the middle longitudinal beam 2011 near the mounting beam 102. The middle frame 201 is engaged with the support position through the mating seat 2013. The mating seat 2013 and the support seat 1021 are engaged, which can effectively increase the number of support points of the middle frame 201. The support seat 1021 can distribute the stress on the connecting component 202 and improve the reliability of the mounting beam 102 in supporting the middle frame 201.

[0042] Specifically, such as Figure 1 and Figure 2As shown, support seats 1021 are provided on both sides of the longitudinal Y direction of the mounting beam 102. The support seat 1021 includes a longitudinally extending support tube and an inclined brace tube located below the support tube. One end of the inclined brace tube is connected to the support tube, and the other end is connected to the outer wall of the mounting beam 102. This type of support seat 1021 is stable and reliable. The mating seat 2013 is an annular cylinder sleeve provided on the transverse X side wall of the middle longitudinal beam 2011. This type of extended support structure can adjust the height of the middle longitudinal beam 2011 by changing the steel rings of different diameters.

[0043] In one possible implementation, the top frame 3 includes a top frame body 301 and a first top vertical beam 302. The two ends of the longitudinal Y direction of the top frame body 301 are respectively connected to the second main frame 1012, and one end of the longitudinal Y direction of the top frame body 301 is connected to the mounting beam 102. The top of the first top vertical beam 302 is connected to the end of the top frame body 301 away from the mounting beam 102, and the bottom is connected to the end of the first main frame 1011 away from the mounting beam 102. The top frame body 301 has a simple and reliable form. The top frame body 301 can not only protect and restrain the left and right sides above the first battery mounting position, but also form protection and restraint on the side of the transverse X direction away from the mounting beam 102 of the first battery mounting position and the second battery mounting position.

[0044] Specifically, such as Figure 2 and Figure 4 As shown, the top frame 301 has a first bracket 304 on one side wall near the mounting beam 102, and a third mounting seat is provided on the top of the mounting beam 102. The top frame 301 is detachably connected to the third mounting seat through the first bracket 304.

[0045] Furthermore, there are multiple first top vertical beams 302, which are spaced apart along the longitudinal Y direction.

[0046] In one possible implementation, the end of the middle frame 201 away from the mounting beam 102 is detachably connected to the first top vertical beam 302. The first top vertical beam 302 can provide more support for the middle frame 201, which can effectively improve the stability of the middle frame 201 and also improve the integrity of the battery pack frame.

[0047] Specifically, such as Figure 1 As shown, multiple second supports 305 are provided at vertical Z intervals on the first top vertical beam 302. The first top vertical beam 302 is detachably connected to the middle longitudinal beam 2011 and the first main frame 1011 through the corresponding second supports 305.

[0048] In one possible implementation, the top frame 3 further includes a second top vertical beam 303, the top of which is connected to the end of the top frame 301 away from the mounting beam 102. The main frame 101 also includes a support beam 1013, the bottom of which is connected to the end of the first main frame 1011 away from the mounting beam 102. The middle frame 201 is provided with a connecting seat 2014 at the end away from the mounting beam 102. The bottom of the second top vertical beam 303 is detachably connected to the top of the support beam 1013 through the connecting seat 2014. With this connection method, the support beam 1013 can support the end of the middle frame 201 away from the mounting beam 102 when the top frame 3 is not assembled. The structure is simple and reliable, and the overall strength of the frame is also improved.

[0049] Specifically, the second top vertical beam 303, the connecting seat 2014, and the support beam 1013 form a connection group. There is no limit to the number of connection groups; there can be one or more.

[0050] Preferably, such as Figure 1 As shown, the second top vertical beam 303, the connecting seat 2014, and the support beam 1013 are centered along the longitudinal direction Y, which can effectively improve the stress balance after the support connection.

[0051] In one possible implementation, the battery pack frame also includes a support member 4, which is connected to the main frame 101, the mounting beam 102 and the top frame 3 respectively. The support member 4 can further improve the support reliability and integrity inside the battery pack frame.

[0052] Specifically, the support member 4 is a diagonal brace made of high-strength steel. The support member 4 is located in the middle of the longitudinal Y direction of the frame and can bear the vertical load in the middle.

[0053] In addition, such as Figure 6 As shown, at least two batteries 6 can be arranged along the longitudinal direction Y in the first battery mounting position and the second battery mounting position. The support member 4 is located between the two batteries 6 that are ringing, which will not affect the normal installation of the batteries 6, and at the same time can also serve to separate the mounting positions and prevent the batteries 6 in the same mounting position from moving randomly along the longitudinal direction Y.

[0054] In one possible implementation, such as Figure 2 As shown, the main frame 101 also includes a protective plate 1014. Both ends of the first main frame 1011 in the longitudinal Y direction are provided with protective plates 1014. The protective plates 1014 are connected to the first main frame 1011 and the second main frame 1012 respectively. The protective plates 1014 can play a role in strengthening the structure and further improve the structural reliability of the battery pack frame at both ends in the longitudinal Y direction.

[0055] Specifically, such as Figure 2As shown, the protective plate 1014 has several hollow structures. This type of protective plate 1014 makes it easier to arrange the mounting brackets for pipes, wire harnesses, etc. The mounting brackets can be welded onto it more conveniently. At the same time, the large area of ​​hollows also provides more space for the installation of pipes and wire harnesses.

[0056] According to an embodiment of the present invention, in another aspect, an electric tractor is provided, comprising: a vehicle body, at least two of the aforementioned battery pack frames and a battery 6, the vehicle body having a frame 5 extending along the longitudinal direction Y; at least two of the aforementioned battery pack frames are symmetrically arranged on both sides of the transverse direction X of the frame 5; the battery 6 is disposed in a first battery mounting position and a second battery mounting position of the battery pack frame.

[0057] In one possible implementation, the top of the battery pack frame is on the same plane as the top of the frame 5. This arrangement of the battery pack frame lowers the center of gravity of the vehicle while keeping the height of the upper surface of the entire frame 5 at the rear of the cab uniform. This allows for more functional and layout expansions and avoids interference between the battery pack frame and other components.

[0058] In one possible implementation, the battery pack frames arranged opposite each other are connected by a number of crossbars 7. The crossbars 7 are located at the bottom of the frame 5, which can effectively improve the stability of the battery pack frames after installation and prevent the battery pack frames from swaying.

[0059] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack frame, characterized in that, include: The main frame (1) has an internal installation space. The main frame (1) includes a main frame body (101) and multiple mounting beams (102). The mounting beams (102) extend vertically (Z). The main frame body (101) is connected to one side of the vehicle frame (5) in the width direction through the mounting beams (102). The main frame body (101) has a first battery mounting position. The middle frame (2) is disposed in the installation space and located above the first battery mounting position. The middle frame (2) is detachably connected to the main frame (1). The top of the middle frame (2) has a second battery mounting position. The top frame (3) is located at the top of the installation space and above the second battery mounting position. The top frame (3) is detachably connected to the main frame (1) and the middle frame (2).

2. The battery pack frame according to claim 1, characterized in that, The main frame (101) includes a first main frame (1011) extending in the longitudinal direction (Y) and a second main frame (1012) extending in the vertical direction (Z). The second main frame (1012) is provided at both ends of the first main frame (1011) in the longitudinal direction (Y). The bottom of the first main frame (1011) and the second main frame (1012) are connected. The middle frame (2) includes a middle frame body (201) and multiple connecting components (202). The two ends of the middle frame body (201) in the longitudinal (Y) direction are respectively detachably connected to the corresponding second main frame (1012) through fastening components. The middle frame body (201) is detachably connected to the corresponding mounting beam (102) through the connecting components (202).

3. The battery pack frame according to claim 2, characterized in that, The central frame (201) includes multiple longitudinal beams (2011) and multiple transverse beams (2012). The multiple longitudinal beams (2011) are spaced apart in the transverse direction (X), and adjacent longitudinal beams (2011) are connected by multiple spaced transverse beams (2012). The connecting assembly (202) includes a diagonal brace (2021) and a connecting plate (2022). One end of the diagonal brace (2021) is connected to the bottom of the central longitudinal beam (2011) near the mounting beam (102), and the other end is connected to the wall of the mounting beam (102) through the connecting plate (2022). And / or, at least one side wall of the longitudinal (Y) direction of the mounting beam (102) is provided with a support seat (1021), the top of the support seat (1021) is provided with a support position, and the middle longitudinal beam (2011) near the mounting beam (102) is provided with a mating seat (2013), and the middle frame (201) overlaps and engages with the support position through the mating seat (2013).

4. The battery pack frame according to claim 2, characterized in that, The top frame (3) includes a top frame body (301) and a first top vertical beam (302). The two ends of the top frame body (301) in the longitudinal (Y) direction are respectively connected to the second main frame (1012). One end of the top frame body (301) in the longitudinal (Y) direction is connected to the mounting beam (102). The top of the first top vertical beam (302) is connected to the end of the top frame body (301) away from the mounting beam (102), and the bottom is connected to the end of the first main frame (1011) away from the mounting beam (102).

5. The battery pack frame according to claim 4, characterized in that, The end of the middle frame (201) away from the mounting beam (102) is detachably connected to the first top vertical beam (302).

6. The battery pack frame according to claim 4, characterized in that, The top frame (3) also includes a second top vertical beam (303), the top of which is connected to the end of the top frame body (301) away from the mounting beam (102). The main frame body (101) also includes a support beam (1013), the bottom of which is connected to the end of the first main frame (1011) away from the mounting beam (102). The middle frame body (201) is provided with a connecting seat (2014) at the end away from the mounting beam (102). The bottom of the second top vertical beam (303) is detachably connected to the top of the support beam (1013) through the connecting seat (2014).

7. The battery pack frame according to any one of claims 1 to 6, characterized in that, The battery pack frame also includes a support member (4), which is connected to the main frame (101), the mounting beam (102) and the top frame (3) respectively.

8. The battery pack frame according to any one of claims 2 to 6, characterized in that, The main frame (101) also includes a guard plate (1014), and the guard plate (1014) is provided at both ends of the longitudinal (Y) direction of the first main frame (1011). The guard plate (1014) is connected to the first main frame (1011) and the second main frame (1012) respectively.

9. An electric tractor, characterized in that, include: The body has a frame (5) that extends along the longitudinal direction (Y); At least two battery pack frames according to any one of claims 1 to 8 are symmetrically arranged on both sides of the transverse (X) side of the vehicle frame (5); The battery (6) is disposed in the first battery mounting position and the second battery mounting position of the battery pack frame.

10. The electric tractor according to claim 9, characterized in that, The top of the battery pack frame is on the same plane as the top of the vehicle frame (5), and / or the battery pack frames arranged opposite each other are connected by a number of crossbars (7), which are located at the bottom of the vehicle frame (5).

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